<!DOCTYPE html>
<html lang="zh-CN">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;    
}
        /* 脉冲动画 */
        @keyframes pulse{
            0% {}
            50%{
                width: 15px;
                height: 15px;
            }
            100%{
                width: 32px;
                height: 32px;
            }

        }
        .map {  
            position: relative;
            width: 848px;
            height: 701px; 
            margin: 0 auto; 
        }
        .map .city {
            position: absolute; 
            width: 6px;
            height: 6px; 
        }
        .map .city .spot {
            width: 6px;
            height: 6px;
            background-color: #007ACC;
            border-radius: 50%;
        }

        /* 热点绝对定位 */
        .map .bj {
            top: 262px;
            left: 634px;
        }
        .map .jx {
            top: 514px;
            left: 642px;
        }
        .map .tw {
            top: 581px;
            left: 744px;
        }
        /* 脉冲水平垂直居中对齐 */
        .map .city div[class^="pulse"] {
            position: absolute;
            top: 50%;
            left: 50%;
            width: 6px;
            height: 6px;
            transform: translate(-50%,-50%);
            box-shadow: 0 0 8px #009dfd;
            border-radius: 50px;
            animation: pulse 0.9s linear infinite alternate;
        }
        /* 脉冲延时 */
        .map .city div.pulse2{
            animation-delay: 0.3s;
        }
        .map .city div.pulse3{
            animation-delay: 0.6s;
        }
    </style>
</head>

<body>
    <div class="map">
        <img src="img/map.png"/>
        <!-- 北京 -->
        <div class="city bj">
            <!-- 热点 -->
            <div class="spot"></div>
            <!-- 脉冲 -->
            <div class="pulse1"></div>
            <div class="pulse2"></div>
            <div class="pulse3"></div>
        </div>       
        <!-- 江西 -->
        <div class="city jx">
            <!-- 热点 -->
            <div class="spot"></div>
            <!-- 脉冲 -->
            <div class="pulse1"></div>
            <div class="pulse2"></div>
            <div class="pulse3"></div>
        </div>
        <!-- 台湾 -->
        <div class="city tw">
            <!-- 热点 -->
            <div class="spot"></div>
            <!-- 脉冲 -->
            <div class="pulse1"></div>
            <div class="pulse2"></div>
            <div class="pulse3"></div>
        </div> 
    </div>
</body>

</html>